Liquid pump



c. A. LAusEN O ct. 22, 1935.

LIQUID PUMP v 2 Sheets-Sheet l Filed sept. 28, 1954 C. A. LAUSEN oct. 22, 193.5,

LIQUID PUMP Filed Sept. 28, 19.34 2 Sheets-Sheet 2 ,Poiopiod' ooi. 22, 1935'.

lUNITED STATES 2.61am uomo emu Christian A. Lausen, Fort Worth,

Hugh Leslie Barber, Fort Worth,

of one-hall to Tex. I*

Tex., nlignor Appiiopiion september z8, 1934, sei-iol No. 145,919

' 1s claim. (ci. ics-4e) The invention relates to well pumping devices, particularly to a device for deep well pumping wherein the columnar weight or the liquid in the well casing is too heavy for ordinary pump- 5 ing 'purposes and the columnar weight is utilized :lor maintaining a balance` of the liquid during the' pumping operation. v V

A further object is to provide a piston cylinder within the well casing and provided with a reciprocating double piston therein actuated by a pump alternately applying pressure to the column vof liquid around the cylinder within the casing and to the upper end of the' piston for intermittently lifting liquid on its upward. strokes and which liquid has been previously. trapped above the lower'piston on a previous down stroke.

A further object is to provide a reciprocating piston in the pipe circuit and diaphragm con- 'trolled ior alternately applying pressure in one direction and the other for` varying the direction of movement of the pumping piston. within the p well casing. 'A further object is to provide the reversing piston with a casing having a diaphragm casing` Aon the upper end thereof and a lull stroke roo'l having a cam member to which a cross bar is pivoted and rollers between which the cam inember moves in its upward and downward movement to full stroke upper and lower positions; said cam member and rollers maintaining said full stroke positions. Also to mount the rollers on pivotedarms through which a rod extends and coiled springs onthe rod and cooperating with the outer sides of the pivoted arms for normally forcing the same towards the opposite sides of the cam. A

A further object is toJ providethe reversing piston casing with a pressure intake pipe leading to a pumpand with spaced pipes leading to the well casing and piston cylinder and valves or ports in the control valve and positioned whereby i when the control pdston is in extreme positions pressure will be admitted to one or the other ofv the pipes leading to the well Also to provide ports in the control piston and alternately placed into registration with the pipes and with discharge pipes leading from the device for discharging liquid from the well on thel upward strokes of the well piston. Y

A further object is to provide bypass pipes from the well pipe to oppositesides oi the diaphragm whereby pressure built up abovethe columnar pressure will act on the diaphragm for lreversing the pumping operation and the movement of the uiting pist-ion.A Alsol to provide cushioning .oyiin-f',

within/the well casing l in spaced relation tothe ders in connection with the pipe lines to take up the jar in the system incident to the velocity of the liquid. With the above and other objects in view the .invention resides in the combination and arl.

rangement of parts as hereinafter set forth, shown in the drawings, described and claimed, it being understood that changes in the precise embodiment of the iriventionmay be made within the scope of what is claimed without departing from 10 the spirit of the invention.

In the drawings: Flgurerl is a view in elevation system. n

- Figure 2 is an enlarged vertical transverse sec- 15 tional view through the well casing` and parts oi the pump therein.

Figure 3 is a view iii-elevation of diaphragm control mechanism, parts being shown in ver--` tical longitudinal cross section to better show 2@ the structure.

Figure e is a horizontal sectional View taken on line it-i oi Figure 3. e

Referring to the drawings, the numeral i designates the well casing. particularly of the type used in connection with deep wells, for instance oil wells of the non-flowing type and 2 a cap carried by the upper end of the casing, and which is disposed above the ground level 3. Disposed inner periphery thereof is a stationary cylinder d which comprises an upper section 5 and a lower section The cylinder l is elongated4 and mayl be of any length desired, depending upon the amount of liquid it is desired to lift on each reciprocatlon of the lifting piston l.

The cylinder sections 5 and t are connected together by a vspacing member la, which engages the inner periphery oi the casing i as clearlyr shown in Figure 2, and is provided with internally 40 threaded ilariges d in which the adjacent ends of the cylinder sections 5 and 6 are threaded. Threaded at s on the upper end of the `cylinder section 5 is a reducing coupling lil in the reduced portion oi which the discharge tube i I is thread- 45 ed, and which discharge tube extends upwardly ,f through the packing i2 in the cap 2, and through which tube liquid discharged from 'the device is forced upwardly on the upward strokes of the piston 1. Threaded on` the lower end of the cylinder d is a cap I3 in which is vertically movable a disc valve I4 which cooperates with a valve seat I5 and when unseated on the upward strokes of the piston 'I allowsl iluid to enter-the lower I end of the cylinder l lsothat upon the downward u strokes of the piston 1 said fluid will unseat the lower piston Valve I6 and allow the trapped fluid to pass through the ports I1 into the hollow cylinder 6 in the chamber I 8 where upon further upward strokes of the piston the trapped fluid will be forced back through the port i1 and thence upwardly through the hollow piston 1, which is slidably mounted in the packed gland I9, unseating the. upper valve 29 fluid to be forced through the discharge ports 2| in the cap 22 carried by the upper end of the piston and into the chamber of the cylinder 4 above the piston, where it can pass upwardly through the tube II. yThe piston 1, at its upper and lower ends is provided with packing rings 23, preferably of the cup 'type for preventing escape of iiuid around the piston. l

Connected'to the upper end of the discharge tube H is a discharge pipe 24 which is connected to the control piston casing 25 at 26, and connected to 'the casing 25 is a pipe 21, which discharges into the ycasing chamber 28 above the member 1a, so that pressure may be intermittently supplied to the column of liquid in the casing chamber 28 for applying pressure -to the underside of the upper piston 23 through the apertures 29 for forcing the piston intermittently upwardly for the intaking ,operation and unseating of the dise valve '|4. Pressure is intermittently applied to the upper end of the piston 1 v through the pipe 24.'

Any kind of pump 30 may be used; however, a conventional form of pump is shown and supplies pressure to the casing 25 through the pipe 3| and this pressure is alternately supplied to the pipes 24 and 21 for changing the liquid balance within the well structure. To accomplish this result a vertically movable control piston 32 is 1 provided within the casing 25 and is provided with a V-shaped port 33 in the periphery of the piston which is adapted to cross-connect the pressure supply port 34 with the ports 35 and 36 according to whether the piston 32 is in upper or lower position; it being shown in lowered position in Figure'3, and at which time pressure is passing through the pipe 21 for forcing the piston 1 upwardly for the intaking operation and when the piston 1 is stopped in its upward movement by engaging the under side of the reduced cou- 4pling I0, the liquid balance in the-device is overcome, thereby 'causing pressure to engage the under side of the diaphragm 31 within the diaphragm casing 38 through` the pipe 39. This action will cause upward movement of the piston valve to cross-connect ports 34 and 35 in the casing 25 and supply pressure to the upper side of the'piston 1 through pipe 24 and tube II thereby forcing the piston 1 downwardly, for the reverse operation.

As the piston 1 moves downwardly during the above operation, disc fvalve I4 seats and the weighted valve I6 is unseated. therefore the trapped uid passes through the ports I1 into the chamber I8 around the piston 1, and when the piston reaches the end of its stroke there is aback pressure through the pipe 24, which causes an overbalancing of pressure in the system which will be applied to the upper side of the diaphragm 31 through the branch pipe 40, ,thereby causing a reverse operation. The above operation continues dm'ing the ntire pumping operation. Branch pipes 33 and 40 are preferably provided with air cushioning cylinders 4I, for taking up the shock incident to the velocity of flow of the material. It will be noted that thefluid forced and allowing the trapped upwardly alternately through pipes 24 and 21 will be discharged transversely through the discharge port 42 in the casing 25, as the ports 43 in the control piston are alternately placed in registration therewith and with the ports 35 and 36. It is advantageous to obtain a quick reversing of the operation and movement of the piston 32, and to accomplish this result, the piston is provided with lan upwardly extending rod 44 which extends through the upper side of the diaphragm casing 38, and is provided with a rectangularly shaped cam 45, which has mounted thereon substantially horizontally disposed bar 46 at 41. Pivotally connected at 48 to the upper side of the diaphragm casing 38 are upwardly extending rocker arms 49, the upper ends of which are connected together by a rod 58 which extends therethrough and preferably through elongated apertures therein. Interposed between the outer sides of the arms 49 and washers 52, carried by the outer end of the -rod 59 are expansion springs 53 for normally forcing the free ends of the arms 4,9 towards each other.

Pivotally connected at 54 to the 4arms 49 and slidably connected at 55 tothe outer ends of the L bar 46 are rock levers 56, the inner ends of which are provided with rollers 51 whichv are engaged by the rectangularly shaped cam member 45 which has opposite corners` horizontally disposed so that when the diaphragm forces the cam above or below the rollers there will be a quick movement incident to the rock levers 56 being moved at the same time as the bar 46 and the spring action forcing the arms 49 towards each yliquid columns in a manner whereby it will force upwardly or downwardly the piston for raising and trapping fluid to be lifted by successive operation.

Where the device is used in connection with the lifting of liquids which would damage the diaphragm, a sliding therefor if desired.

'I'he invention having been set forth what is claimed as new and useful is:`

l. A well pumping device comprising a well casing, a hollow cylinder within said casing in spaced relation thereto, a flange carried by said cylinder and forming the casing into upper and lower compartments with the upper portion of the cylinder in the upper compartment and the lower portion of the cylinder In the lower compartment, a? double piston within the cylinder, said double piston having a chambered portion slidably mounted in the by the lover piston, a valve carried by the upper piston, valve means for trapping uidin the lower end of the cylinder upon upward movement of the piston, said valve means in the lower piston forming means whereby upon downwardly movement of the chambered member connecting the pistons fluid trapped in the lower end of the cylinder will be transferred to a position within the chamber of the cylinder above said valve piston may be substituted ange, a valve carried etY means and upon upward movement of the pisconnecting 4the 'pistons 75' movement of the piston, a valve carried by the,

upper end of the piston rod and past which fluid is forced on the upward strokes of the piston rod and means for alternately applying pressure to .the upper chamberfof the casing and the upper chamber of the cylinder whereby said piston will be forced upwardly and alternately applying pres-1 sure to the upper end of the piston for forcing said piston downwardly.

3. A well pumping device comprising a well casing, a cylinder within said casing in spaced relation thereto, a partition. dividing said cylinderand well casing into upper and lower cham bers, a hollow piston rod slidably mounted in said partition, an upper valved piston carried by the piston rod within the upper chamber of the cylin'- de a lower valved piston carried by the lower en of the piston rod, means for alternately applying pressure to theupper and under sides of ythe upper piston within the 'upper chamber of lthe cylinder, said valved lower piston forming means whereby upon downward movement of the piston rod fluid trapped in the lower end of the -lower cylinder chamber will be transferred to said chamber above the valved piston and upon upward movement of the piston rod uid within the lower chamber above the lower piston will be forced upwardly lthrough the piston rod.

4., A device as set forti in claim3 wherein the flower piston comprises .a; vertically movable weighted disc valve, and ports in the piston to the sidesv of the valve' and positioned whereby when vthe disc valve 'is in lowered position the lower portion of the ports are closed and when in upper position the lower portion of said portsrarevopened.

5. A device as set forth in claim 3 including disc valves carried by the valved pistons, said disc valves alternately opening and closing the ports.

6. Avdevice as set forth in claim 3 including a disc valve carried by the lower end of the cylinder, said disc valve being opened upon upward -strokes of the piston and closed upon downward Y strokes, the valvedv lower piston being controlled l 'by adisc valve opened on the downward stroke of the piston'andclose'd on' the upward strokes y. J1. -A device as setforth in claim 3 including ports of communication between theupper cham- 'v bers of the casing and. the upper chamber of the cylinder, whereby pressure isiadmittedto the underside ofthe upper valved piston around the holvlow piston rod. d

8. A-device asset forth in claim 3 including a diphragm controlled piston, a-'pressure supply source in connection with'said diaphragm control piston, a discharge pipe from the well cylinder, a pressure supply pipe from the upper chamber ofthe cylinder chamber, ports inl the diaphragm controlled piston positioned whereby 3 pressure from the pressure source of supply will be alternately'applied to said pressure pipel and discharge pipe and means whereby when the pressure on either of said pipes is unbalanced pressure on the diaphragm will be shifted from one 10 side 'to the other and the piston moved for the reversing operation and means for discharging lifted liquid from the discharge pipe through ports in the piston. 1 l

9. The combination with a well pumping de- 15 vice'having a reciprocating piston therein reciprocated by an overbalancing pressure in a pressure supply pipe and a discharge pipe, of a diaphragm controlled piston having ports alternately registerable with said pipes upon over- 20 balancing of pressure. a-casing-in which said diaphragm controlled piston is slidably mounted( branch pipe connections between said pipes and opposite sides of the diaphragm for shifting pressure from one side to the other for the reversing 25 operation, a source of pressure supply and ports carried by the diaphragm control piston and adapted to registeri with discharge ports in the diaphragm controlcasing.

10. A device as set forth in claim 9 including 3o cushioning cylinders carried by the branch pipes. 11. A device as set forth in claim 9 including springcontrol means in connection with the diaphragm controlled valve whereby there will be4 a relatively quick movement of the diaphragm at a5 the' time of shifting of the piston.

' 12. A device .as set forth in .claim 9 including a piston rod carried by the diaphragm, a rectangularly shaped cam member carried 'by said piston and havig upwardly and downwardly con- 40 vergingcam surfaces, upwardly extending `piv oted arms at 'opposite sides of thecam, roller carrying arms pivoted to the upwardly extending arms and having ,rollers `cooperating with complementary cam surfaces of the cam, the outer ends of said roller arms having a-loose connection with the horizontal arm carried by the cam, a rod extending through the upper ends of the upwardly extending arms and springs carried by said rods and cooperating with theouter sides of the up- 4 wardly extending arms for normally forcing the same towards lreach other. 4

13. IIl'he combination with a well pumping device having 'la reciprocating piston therein reciprocated by an overbalancing pressure, a '55g pressure supply pipe connectedt'o said pumping device, a discharge pipe connected to said pump-l ing device, `a source of pressure supply for said pipes, of a control member having ports alternately registering with id pressure supply pipe no and dischargefpipe, said control member beingcontrolled by an alternate overbalancing of .prles-y sure in the pressure supply pipe and discharge 

